Of course, Vampires are genetically infused with an instinctual urge for human blood. To them healthy human blood tastes like unimaginably sweet nectar beyond description in terms the average person could understand. Beyond the pleasure any food, or beverage, brings a human. However, like food not all types of blood are the same to the vampire palate. Some blood types are more favorable and energizing than others. It’s the opposite of human food. For us it seems bad tasting foods, such as spinach, are better for us while sweeter tasting blood equals more power boosting for vampires. Vampires can get the aroma of these blood types through the air even 100 feet away from a human so they can pick, and choose their victims, aka meals, at will.
Naturally, the rarest blood types are the best tasting. The rarest of all blood types among humans, AB-, is said to be the most alluring yet it’s the only one that will make vampires feel ill, and weaken their powers for a time. This is the blood type of many Vampire Slayers who aren’t of the half-vampire variety. Only about 1% of the global populace has this blood type. If you happen to have this blood type odds are you were meant to be a vampire slayer or some manner of warrior fighting against the forces of supernatural evil. It’s thought that this blood type may weaken vampires due to the possibility of AB- humans having higher dimensional Angel ancestors.
The best-tasting blood with the most powerful energy boost is the next rarest which is B- of which 2% of the populace has flowing through their veins. Then next sanguine selections ranging in order from best to worst are A-, O-, AB+, B+, and A+. The least desirable among the blood types is O+ which is the most common human blood type on Earth. In general, vampires pass over O+, and hold out for A+, and B+. So almost 40% of the populace doesn’t have to really worry about being attacked by a vampire…unless they’re really hungry!
That being said vampires find animal blood to be bearable in a pinch while the blood of various supernatural creatures can give them temporary powers in much the same way humans can gain abilities from vampire blood. Of course, the blood of some paranormal beings can be deadly to a vampire! How Vampires Are Affected By The Blood Of Various Creatures Paranormal Or Otherwise.